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ATR-IR Investigation of Solvent Interactions with Surface-Bound Polymers.
Mathis, Christian H; Divandari, Mohammad; Simic, Rok; Naik, Vikrant V; Benetti, Edmondo M; Isa, Lucio; Spencer, Nicholas D.
Afiliación
  • Mathis CH; Laboratory for Surface Science and Technology and ‡Laboratory for Interfaces, Soft matter and Assembly, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland.
  • Divandari M; Laboratory for Surface Science and Technology and ‡Laboratory for Interfaces, Soft matter and Assembly, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland.
  • Simic R; Laboratory for Surface Science and Technology and ‡Laboratory for Interfaces, Soft matter and Assembly, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland.
  • Naik VV; Laboratory for Surface Science and Technology and ‡Laboratory for Interfaces, Soft matter and Assembly, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland.
  • Benetti EM; Laboratory for Surface Science and Technology and ‡Laboratory for Interfaces, Soft matter and Assembly, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland.
  • Isa L; Laboratory for Surface Science and Technology and ‡Laboratory for Interfaces, Soft matter and Assembly, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland.
  • Spencer ND; Laboratory for Surface Science and Technology and ‡Laboratory for Interfaces, Soft matter and Assembly, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland.
Langmuir ; 32(30): 7588-95, 2016 08 02.
Article en En | MEDLINE | ID: mdl-27397856
Solvent interactions with bulk and surface-bound polymer brushes are crucial for functionalities such as controlled friction and thermoresponsive adhesion. To study such interactions, the temperature-induced solvent-quality changes and the effect of surface tethering on the mechanical and tribological properties of poly(dodecyl methacrylate) (P12MA) brushes have been investigated by means of attenuated total reflection infrared spectroscopy (ATR-IR), as well as atomic force microscopy (AFM) and lateral force microscopy (LFM). These results have been compared with temperature-dependent UV-visible spectrophotometry (UV-vis) data for the corresponding bulk polymer solutions. The ATR-IR results clearly show that increasing temperature enhances ethanol uptake in P12MA, which results in film swelling. This is accompanied by a marked increase in both adhesion and friction. We have also shown that a combination of solvents, such as toluene and ethanol, can lead to a temperature-dependent solvent partitioning within the polymer brush. To our knowledge this is the first time preferential solvent uptake in a grafted-from brush has been monitored via in situ ATR-IR. Moreover, we have observed remarkably different behavior for polymer chains in solution compared to the behavior of similar chains bound to a surface. The presented findings on the temperature-dependent solvent interactions of surface-grafted P12MA reveal previously unknown solvation phenomena and open up a range of possible applications in the area of stimuli-responsive materials.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Langmuir Asunto de la revista: QUIMICA Año: 2016 Tipo del documento: Article País de afiliación: Suiza Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Langmuir Asunto de la revista: QUIMICA Año: 2016 Tipo del documento: Article País de afiliación: Suiza Pais de publicación: Estados Unidos